Improvement in machines for nicking and turning the heads of wood-screws



UNITED STATES PATENT OFFICE.

- THOMAS W. HARVEY, OF POUGHKEEPSIE, NEW YORK.

Specification forming part of Letters Patent No. 14S, dated March 25, 1837.

T0 all whom it may concern:

Be it known thatI, THOMAS W. HARVEY, of Poughkeepsie, in the county of Dutchess and State of New York, have invented a new and useful Improvement in Machines for Nicking and Turning the Heads of Screws, commonly called wood-screws, and I do hereby declare that the following is a full and exact description of the construction and operation of the said machine as invented by me, reference being had to drawings annexed.

Figure l shows a perspective view of the front side of the machine. Fig. 2 shows a perspective view of the back side of themachine. Fig. 3 shows a side view exhibiting the cutting-spindle. Fig. 4 shows a top view giving a view of the stands, (inc. Fig. 5 shows an end view, giving aview of the saw and its connecting-bars. Fig. 6 shows an end view of the stands and driving-pulleys for saw and its connection with upright driving-shaft. Fig. 7 shows the connecting-bar of saw on the back side, bent to pass the main shaft of die-wheel. 8 shows the guide-pieces to die-wheel. Fig. 9 shows the blank piece of die-wheel before the xtures are put to it. Fig. lO shows a cross-section of die-wheel with a moving die-arm attached and the location of the screw in the die. Fig. 11 shows a side view of a part of the die-wheel, showing the temper-screw to regulate for the length off' the screw, also the fastenings of dies and/' top View of a part of die-wheel. Fig. l2 shws a side view of the die-wheel above the ame, showing the moving die arms screv d 0n and regulating-screw partly exposed/t0 View under said arms. Fig. 13 shows a gid@ view of saw with the collars. Fig. 14,shows an end view of the cutting end of (Hitting-Spindle without the cutters in. Fig. 215 Shows the same parts with the cutters in. Fig, 16 shows a side view of the cutting end 0f Cuttingspindle with the cutters in. "Fig 17 shows an edge view of one of the moving arms holding a cutter. Fig. 18 shows gfside and edge view of the spring which hlds up the moving die-arm While the niclfis sawing, Fig. 19 shows an edge view of f, e arm or bar that moves the cutting-spind1e- Fig. 20 shows the `location of the driving-shaft and, bevel-gears.

Fig. 21 shows a back side view showing the location of the ratchet-wheeland the ratchet and holdfast-catch. Fig. 22 shows one-half size section temper-screws and dies laid open right and left. Fig. 23 shows a side view of the eccentric grooved cam for raising and falling the saw in cutting the nick. Fig. 24 shows a side view of the eccentric grooved cam that moves the cutting-spindles. Fig. 25 shows a side view of the eccentric grooved cam for holding fast the screw in the die-wheel while turning the head. Fig. 26 shows a side view of two eccentric cams united, the face of one on one side and the face of the other on the other that gives motion to the ratchet and hold-fast. Fig. 27 shows an end viewof the end piece of frame; Fig. 28 showsone-half size view of a cross-section of the die-wheel and a View of the dies. Fig. 29 shows an edge view of the catch and lever. Fig. 30 shows a side view of the bevel-pinion of drivingshafts.

In Fig.. 1, A A A A, Fig. 2, A A, Fig. 3, A A, Fig. 4, A A, Fig. 6,'A, Fig. 21, A A, Fig. 271,A,

and Fig. 20, A A A are partsoftheirame-,whiclris made 0f cas -irenhd is the superstructure 0f the maCh/ne to which the several parts are affixed Y, igs. 1, 2, 4, 9, and 12, B is thedie-wheel ,@n shaft @,Figs. l and 2, which shaft rests on plumer-boxes b, Figs. 1 and 2, which plumerboXes arev attached to the stands c c, Figs. 1 and 2. Said die-wheel is shown at Fig. 9, the main piece, Fig. 10, a cross-section, showing the moving die-arm CZ attached. In Figs. 1., 2, 4, and`2l,C is the ratchetwheel, having thirty-two divisions or ratchets corresponding with the numberl of dies for screws. Said wheel is fastened on shaft a, Figs. 1 and 2, and is moved by the hand e, Fig. 2, which hand swings on shaft a, Fig. 2, and is worked by the arm f, Fig. 2,' which arm is carried by cam D, Fig. 2, being 'connected therewith by pin g, Fig. 2. Said hand is held up to ratchet-Wheel bythe spring h, Fig. 2, restingv against shackle-bar c', Fig. 2. Said racket isheld fast by the lever j, Fig. 2, working cam D, Fig. 2, by throwing back and forward the holdfast K, Fig. 2, upon the teeth on periphery of Vthe ratchet-wheel.

In Figs. 1, 2, 26, and 4, D is the double ec' centric cam working the ratchet-wheel C,Y its connections explained above.

In Figs. 1, 2, 4, and 23, E is an eccentric grooved cam for raising and falling the saw. It works leverV rn m m, Fig. 1, which lever is hung on stand fn, Figs. 1 and 2, w-hich lever is attached by regulating-screw o o, Fig. 1, to shackle-bar P, Figs. 1, 2, 3, and 7, and p19, Fig. 5, which shackle-bar is attached to slidebox q q, Figs. 1 and 2, upon which the sawshaft fr, Figs. 1 and 2, is hung on steel pivots s, Fig. 1. Said pivots are secured by screwnut to the slide. In Figs. 1, 2, 4, and 24, F is an eccentric grooved cam, which moves thecutting-spindle back and forward by working the arm t, Figs11and 3. Said arm is suspended and directed `on cam by the shackle-bar u, Figs. 1 and 3, and working in cam by the steel pin fu, Fig. 1, and connected with the lever w, `lig-s. 1, 3, and 19, which lever w is attached to stand Figs. 3 and 1, and is attached to the cutting-spindle by a collar having wrists y y, Fig. 19, which collar turns on spindle and is kept in place by other collars, forming a iiange on each side and fastened to spindle.

\ The spring Z, Fig. 3, keeps the piece ct a, Fig. 3, thrown, forward, which is made to slideon the spindle when the spindle is drawn back. The pin b b and b 1),'Fig. 16, works in the eccentric grooves e e e e, Fig. 16, and throws open the tool-holders c c and c c, Fig. 16, acting against the spring, by which the toolsl clear the .screw-heads, and as the spindle is thrown still farther back the piece a a is cared back against the boX of stand w and adits of another screw coming onto the line of not to stpp the turn of thepdle S0, 31150, i when the spindle is moved upslSO the WOlk the spring carries the tools forward t0 the work open, the piece a a being brought 1010 3 the shoulder d d. The piece a a, remains sta;`

tionary, while the spindle by the action of".

the pin b b and b 'b closes the tools ff and ff, Fig. 16, under the heads at the saine time the tool g g, Fig. 16, advances and turns the top of the head. The pulley h h, Fig. 3, on cutting NSpindle is carried by pulley 1l 11, Fig. 20. The regulating-screw at jj and jj, Fig. 3, carries up the tool g g less or more.

In Figs. 1, 2, and 4, Gis an eccentric grooved cam, which holds fast the screws in the die- Wheel while turning the head by working the lever k 7c, Fig. 1, which works the arm Z Z, Figs. 1 and 4. Said arm Z Z forms a togglejoint on the piece m m, Figs. 1 and 4, and presses up the die and holds fast the screw.

In Figs. 1, 2, 20, and 4, H is a cross-shaft on which the large bevel-gear I is hung with the operating-cams.

In Figs. 1, 2, 3, 20, and 21, I is a large bevelgear, seven and one-half to one of the pinion.

In Figs. 1, 2, and 20, J is a parallel and horizontal shaft, towhich the bevel-pinion K is attached, and carries upright shaft L, Figs. 1 and 2.

In Figs. 1,2, 20, and 30, K is a small bevelpinion on shaft J.

In Figs. 1, 2, and 6, L is an upright shaft carrying driving-pulley for saw n n, Figs. 1, 2, and 6, which pulley carries the saw-pulley 0 o, Figs. 1, 2, and 5, by the belt P P, Figs. 1 and 2, for which pulleys and belt I have used a chain belt and pulleys therefor to an advautage.

In Figs. 1, 2, and 3, M is a water-cup to drip while the saw is cutting.

. In Figs. 3 and 18, N is a spring attached to stand c, Figs. 1 ,and 3, tohold up the die and grip the screw while the nick is sawing.

In Figs. 1 and 5, O is a saw secured Vonspindle by .collarsand screw. y In Figs. 1, 3, and 8, P is a guide for ldie-V wheel. This piece allows the die-ar1n d to open by the pin q q, Fig. 10, `which isattached to die-arm, and passes through the holes r r, Fig. 9, and strikes against the .guide Q, Fig. 8. In Fig. 8, Q is a guide to open dies and allow the screws to drop out on the under side of die-Wheel, and also to keep open forward of the saw to feed in the screw-blanks.

Operation: The screw-blanks are placed in the dies on the right side of die-wheel, Fig. 1. At each revolution of theshaft H the cam D disengages the holdfast'Kfrom the ratchetwheel @when the hand e moves up and turns the die-wheel one division, (thirty-two divisions or dies, less or more,) when the holdfast K again closes upon the toothof ratchet-wheel and holds it firmly, while bythe action of the cam E the saw is brought `down upon the head of the screw at the vertical point of the die-wheel and commences cutting the nick and brings down the saw gradually. At the same time, by the action of thecam F, the cutting-spindle is brought forward at the horizontal'point of the die-wheel and 4turns the V`@hon the piece m m, the screw is held firm when down, which is six-eighths of the time 0f tt, .revolutionof the shaft I-I. The spindle, retirTl/g, 'moves back, and at the saine time the Saw rises up out of the nick just cut, and then medie-wheel is again turned round one divisionas before described, and a fresh blank is b'iipught under the saw and another fresh one is brought in the line of center of the cutting-.S'mflle, and so on in succession as long as the. ches are supplied with blanks the Operatiqn., is kept up. Each screw as it pagses the horizontal line drops out by the pin q q opening the moving die-arm. The pulley i 1,' Carrie@` the pulley ZZ h Orl th Cuir ting-Spindle, mdlthe pulley n n the pulley o 0 0n saw-Spindlerb th 0f which are kept COH- stantly running. .R imark, I usually arrange four of the ab0vede ribed machines upon one frame.

head. At the same time, by the action of cam What I claim as new, and wish to secure which in -onemaehine the nicking' an turnby Letters Patent in this machine, ising of the heads are effected simultaneously,

1. The particular manner of constructing which operations have been heretofore perthe die-Wheel. formed separately and in distinct machines.

2. The particular manner of constructing THOS. W. HARVEY. ,Y the cutting-spindle. Witnesses: 3.*The general combination of the differ- GEO. N. MINER, ent parts, by the union and arrangement of JAMES FOST. 

